196 
ANALYSIS or A CALCULUS. 
the animal should have lived so long after it was thought the 
rupture must have taken place. 
The second question appears to me to be the most difficult 
to answer. I cannot but think that the horse laboured under 
the usual symptoms attending such diseases, only they were 
overlooked by those who had the charge of him. If this was 
not the case in this instance, then I should infer that the 
absence of acute pain, attended with corresponding pheno¬ 
mena, must have depended upon an idiosyncrasy different 
from most horses. I have never met with a case to confirm 
this theory ; still there may be some truth in it. 
My answer to the first question applies equally to the 
third; I shall therefore leave it for some member of the pro¬ 
fession to negative or confirm it, as his experience or observa¬ 
tion may determine. 
With reference to the fourth question, for my own part I 
have no hesitation in stating that, while rupture of the 
stomach is indicated by marked symptoms, yet, on the other 
hand, in similar lesions of the intestines, the symptoms are 
not characteristic of so much suffering, and hence the animal 
is likely to survive a much longer time. 
ANALYSIS OF A CALCULUS REMOVED FROM 
TtlE URETHRA OF A HORSE. 
By Professor R. V. Tuson, Royal Veterinary College. 
The chemical literature of calculi and urinary deposits 
peculiar to the lower animals is, even at the present day, 
excessively meagre and imperfect. It appears to me ex¬ 
ceedingly probable that the results of carefully conducted 
quantitative analyses of such substances would not only be 
interesting in a purely scientific point of view, but would 
likewise be a source of useful information to the practitioner 
of comparative or veterinary medicine. 
I may observe that I have set myself the task of making 
such analyses as these in my leisure moments, with a view’, 
as I hope, at some future time to publish the results of my 
labours. 
In order to carry out the investigation completely and 
successfully, it will be necessary, however, to examine a very 
great number of calculi, from all classes of animals. May 
1 hope, then, that any gentlemen who possess concretions 
